Book One of Apocalypse Babes, The Z Word, follows Seffy Carter and her longtime friends Gareth, Addison and Lani. The four besties share a past dysfunctional and dark enough to keep them bound together under do-over identities. But rends develop in their relationships from the flesh-eating pressures of ending up in 1980, in a Montana desert, surrounded by zombies wearing dated disco duds.